Assembling tool



Patented sept.d 2i, 192e.

, 'TUNlTEDi--f STA-TES RICHARDA G. ivrcoAivN Anp 'VAL' J'. HUETTR, on sroiaivn, `wAsHiivsroiv;

'AssiiMBLIN'G Toon. l

y.^.-pp1i.aton filed February 16, 1926. Serial No. 887,534. v

Our invention relates to iran improved assembling tool of the pliers type `especially adapted for the purpose of 'apply/ing piston rings to and removing'themfrom= Y.their grooved pistons; y w

The manually operated tool is provided with meansl for distending or separating the ends ofthev standard type of` resilient,isplit, piston ring, combined with means forfsupporting -orjcarrying the ring in distended positiomeith'er for placing the `riiig'rin :positionvv onthe piston, or for removing 'the ring from the piston. The tool is also provided with means, adjustable to various'sizesof piston'rings', vfor vlimiting 'the distending ac` tionV of the tool to prevent' excessive expan sion of the :piston ring" that might result in injury tothe ring.-

Y v Our invention 'consists in certain'novel combinations and arrangement of parts wherebyy a lhand tool of this character is providedthat is simple in construction' and composed ofa minimum number'of parts, thus renderingwit comparatively inexpensive in the cost ofv manufacture; which may b e manipulated with facility by the'us'e of one hand; and which is reliable in the performance of its required functions.V

In the accompanying drawings we 'have illustrated y,one completeV example of the physical embodiment of our angedin accordance with the best mode we have thus far devised for the practical application of the principles of ourv invention.

Fig. 1 is a plan view of the device em bodying our invention;

Fig. 2'is an edge view ofthe tool;

Fig. 3 is an enlarged detail plan view, with the handles omitted for convenience of illustration, showingthe tool applied to a piston ring and holding its ends open; and

Fig. 4 is an enlarged detail view showing 4the relation of one of the supporting heads of the tool tothe piston ring.

In order that the general assembly and relation of parts may readily be under stood we have shown in Fig. 3 the overlap` ping ends land 2 of a resilient split piston ring having shoulders 3, with the ends sprung apart by the action of the tool, either for slipping the ring over the piston head to position for use, or for withdrawing the ring from its annular seat or groove in the piston preparatory to removal of the ring.

The ltool is fashioned with a pair of invention f wherein the parts are combined and ar- Y handles d and .norniallyheld apart by a pair of Outerends secured tothe inner faces of the handles, and their innerends in frictional contact to vnormally hold lthe jaws-7` vand ,8

i if-Afinifr:,orticaj i spreader springs 6 having their of theV tool in fclosedzposit'ion.; The jaws pressing movement of the. liandles,and consequently' the opening .movement ofy the jaws, is limited by an adjustable screw l() which is threaded Vin a lugj-llA of onejof'the jaws and is adapted to bear'against acom-V loverlap andv areprefera'bly formed integral p-leiiientary lug l2 or abutment .on theotlier jaw. In Fig. 3 it willr be seen`- that the f screw Vmay be adjusted to cause .contactof its end with the abutment 12,and thus limitv the closingmovement ofthe handles and the opening inovementuofthe jaws. In this manner excessive opening of.V the split re silientring is prevented, itbeingfunderstood 'that excessive-opening of thefring will result in distortion andconsequent injjury tothe ring. --By pro'pely adjusting the screwl() the opening movemeiitrof the ring `ma'yjbe predetermined and the danger `of ruining thei piston ringf'is eliminated. 1:.

r Each of the. jaws-is provided within. `taered and pointed spreader armas l3vandll aving outturned points l5, and these arms Vwhich are integral with the respective pivoted jaws, of course, swing outwardly or inwardly on the pivot when the 'handlesl and 5 arev compressed and extended.V Y

As seen in Fig. 3 the loppositely extending points 15 of the tapered arms are designed to be slipped between the adjoining shoulders 3 the split resilient piston ring; The points, when inserted between 'the shoulders, provide an initial separating movement ofthe ring-ends and then j by compressing the handlesof the tool the. ends of the ring are of the overlapping ends 1 and 2-of separated the necessary distance to permit application of the ring to the piston or to permit removal of the ring from the piston in well-known manner.

In co-action "with the spreader jaws we For this purpose,

bars 16 and 17, one located at the outer edge of each of the spreader arms, and supported in slide bearings 18l preferably formed integral with the arms. At their rear ends these bars are fashioned with bent or unhooked retaining ends 19 which projectinto slots 20 of the tapered spreadei` arms to limit the movement of the bars and prevent their displacement with relation to the arms.

At their outer ends these carrier bars are fashioned with carrier. heads 21 formed with an approximate V-shape and bent at substantially right angles to the carrier bars. As best seen in Fig. 4 theseV-shaped heads are designed to impinge against the outer faces-of the ring-ends 1 and 2, one aty each side of the spreader arms, and a spring 22 coiled about the bar and interposed between the carrier-head and a bearing lug 18, holds the carrier head in contact with the ring end.

Due to the V-shape of the carrier head and the tension of the spring of each carrierbar, these .heads co-operate with the spreader points 15 of the spreader arms in holding the ring in the tool. Thus tlie split resilient ring may be held in one hand and the tool lin the other hand. The tool is then applied to the ring, the outwardly turned pointsy 15 being used to separate the shoule ders of the ring, after which these points Vare forced into frictional contact with and between adjoining shoulders of the overlapping ends of the ring. The carrier heads 21 which impinge against theouter faces of the ring-ends are held in that position by the springs 22, and as the tension of these springs 1s notv sufficient to overcome the friction between the respective spreader points and the ring-shoulders, it will be apparent that the ring will be held by the tool and may be manipulated freely for application to the piston or withdrawal therefrom. l

After the ring has been seated in its groove in the piston, the tool .may readiljY be detached therefrom by a' slight pull to withdraw the spreader points from between the shoulders of the ring. f y Having thus fully described our invention, what weclaim as new and desirevto secure by Letters Patent' is- 1 1. The combination in a tool comprising a pairof pivoted jaws and spreader arms thereon, of a spring-pressed carrier bar supported on each arm, and'africtlonal Vbearing head'on each Vbar for co-action with the spreader arms 1n supporting a splitV ring.

2. lThe combination with a pair of pivoted jaws having arms and spreaderpoints on said arms for engagement with the ends of a split ring, of a pair of spring-pressed carrier bars supported on said arms, and a V-shaped bearing head on each bar for frictional engagement withrthe, split ring.

3. The combination in a tool of the pliers type with a pair of arms having oppositelyy extending spreader points, of an adjustable screw and abutment-lug forl limiting the spread ofthe arms, a spring-pressed carrier bar supported on each arm, and a V-'shaped bearing head on each bar :for frictional en-` gagement with al piston ring.

In testimony whereofv we affix our RICHARD G. MCO'ANN. PAULY J. HUETTER,

tures. 

